from datetime import datetime
import pandas as pd

class DutyMixin(object):

    def __init__(self):
        super().__init__()

    def cal(self):
        now = datetime.now()
        f = open("./guoc.csv",encoding='utf-8')
        df = pd.read_csv(f)
        print(f'分析完成。{len(df)} {now}')